How do I get the DP42848 to accept the HDMI inputs?

As the HDMI input of TVs are only meant to accept video signals (to set HDMI specifications), any SMART TV dongle that attaches to the HDMI port is going to output a video signal compatible with the set HDMI specification. A modern TV like yours will be able to accept the digital video signal from any dongle, as it accepts all the common modern formats (1080p, 1080i, 720p, 576p, 576i, 480p, 480i)

Ref
https://www.engadget.com/products/sony/bravia/klv-32nx500/specs

Since the TV accepts HD signals only via DVI and component inputs, the only logical way is to use the "Xbox 360 Component HD AV Cable" as show in the link below:

How to hook up your Xbox 360 or Xbox 360 to TV

The TV will not accept a VGA input. A cable converting HDMI to DVI would also require that you break out the L + R audio channels, too. The one I mentioned above does this all for you with no degradation in video signals.

There should a button on the monitor to switch the input. Press it until you see HDMI on your screen.

Which video inputs in particular - all of them or only the HDMI for example?

Consider sending the main board to us for inspection and possible repair:

http://www.coppelltvrepair.com/newservice

It's free if there is a problem and we can't fix it, it's $20 if we test the board and it all seems fine and it's going to be around $70 if we find and fix the problem; return shipping will be about $10, i.e. all before mentioned prices will have $10 surcharge for the return shipping.

(of course prices are subject to change in time, so you may want to contact us first to confirm)

Hope this helps!

Hi,
Specifications Display Image Aspect Ratio: 16:9 Widescreen Modes: Conventional 4:3 Comb Filter: 3D digital Additional Features: V-Chip, parental control Diagonal Size: 42" - widescreen Display Format: 1080p (FullHD) Resolution: 1920 x 1080 V-Chip Control: Yes Image Contrast Ratio: 2500:1 Brightness: 500 cd/m2 TV Tuner Stereo Reception System: MTS Secondary Audio Program (SAP): Yes Analog TV Tuner: NTSC Video Features HDTV Ready: Yes Analog Video Input Signals: NTSC Input Video Formats: 1080p Remote Control Type: Remote control Audio System Sound Output Mode: Stereo Sound Effects: Virtual Dolby Digital Speakers Included: 2 speakers Additional Features: Mute button Speaker(s): 2 x right/left channel speaker - built-in Connections Connector Type: 1 x composite video input ( RCA phono ) ¦ 1 x S-Video input ( 4 pin mini-DIN ) ¦ 3 x audio line-in ( RCA phono x 2 ) ¦ 2 x component video input ( RCA phono x 3 ) ¦ 3 x HDMI input ( 19 pin HDMI Type A ) ¦ 1 x digital audio output (coaxial) ( RCA phono ) ¦ 1 x audio line-out ( RCA phono x 2 ) Power Power Device: Power supply - internal Power Consumption Operational: 240 Watt General Product Type: 42" LCD TV TV Tuner: 1x analog, 1x digital Width: 41.3 in Depth: 10.2 in Height: 29.7 in Weight: 55.1 lbs HDCP Compatible: Yes Digital Television Certification: HDTV Digital TV Tuner Digital TV Tuner: ATSC, QAM Additional Specifications HDMI: Y More Information Model No.: DP42848 Shipping Weight (in pounds): 67.0 Product in Inches (L x W x H): 41.3 x 10.2 x 29.7 Assembled in Country of Origin: USA and/or Imported Origin of Components: USA and/or Imported Walmart No.: 000503420

hope this will be helpfull to you.
GoodLuck

Maybe the problem is not from cables but from HDMI hole/jack, rusted or something

This site may have what you are looking for

http://www.manualsonline.com/

The tv display resolution will automatically change depends on your source/device output resolution and TV inputs used as well. Television component and HDMI inputs accept 480i up to 1080p signal while composite and s-video accepts 480i(lowest resolution) signals only. You will get high resolution signals from cablebox, game consoles, bluray etc through their component or HDMI output jacks.

The same VGA cable you would use to connect it to a computer monitor.

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